.client-container {
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.main {
    width: 1000px;
    height: 740px;
    background-color: rgb(235, 235, 235);
    border-radius: 5px;

    display: flex;

    z-index: 2;
}

.main .left {
    width: 280px;
    height: 100%;
    background-color: rgb(46, 50, 56);

    border-top-left-radius: 5px;
    border-bottom-left-radius: 5px;
}

.main .right {
    width: 720px;
    height: 100%;
    background-color: rgb(230, 230, 230);

    padding: 0 20px;
}

.cover {
    width: 100%;
    height: 100%;

    background-image: url(../img/background.jpg);

    background-repeat: no-repeat;

    background-position: center center;

    background-size: cover;

    /* 让cover背景图与client重叠，加入定位属性 */

    position: absolute;

    top: 0;
    left: 0;

    /* 设置z坐标,防止覆盖main */
    z-index: 1;

    /* 给背景加入滤镜实现模糊 */
    filter: blur(20px);
}


.main .left .user {
    height: 80px;
    font-size: 20px;
    line-height: 80px;
    color: white;
    padding: 0 20px;
}

.main .left .search {
    height: 40px;
    padding: 0 20px;

    /* 利用弹性布局水平排列 */
    display: flex;

    justify-content: center;
    align-items: center;
}

.main .left .search input {
    height: 34px;
    width: 200px;
    line-height: 34px;
    font-size: 14px;
    color: white;

    background: rgb(38, 41, 46);

    /* 边框和轮廓线 */
    border: none;
    outline: none;

    padding-left: 10px;
    border-radius: 5px;
}

.main .left .search button {
    height: 34px;
    width: 34px;
    /* 边框和轮廓线 */
    border: none;
    outline: none;

    border-radius: 5px;
    background-image: url(../img/搜索.png);

    background-repeat: no-repeat;
    background-size: 20px 20px;

    background-position: center center;

    background-color: rgb(38, 41, 46);
}

/* 按钮点击反馈 */
.main .left .search button:active {

    background-color: grey;
}

.main .left .tab {
    height: 50px;
    display: flex;
    align-items: center;

}

.main .left .tab .tab-session {
    height: 100%;
    width: 50%;

    background-image: url(../img/对话绿.png);
    background-repeat: no-repeat;
    background-size: 30px 30px;
    background-position: center center;
}

.main .left .tab .tab-friend {
    height: 100%;
    width: 50%;

    background-image: url(../img/用户灰.png);
    background-repeat: no-repeat;
    background-size: 30px 30px;
    background-position: center center;
}


.main .left .list {
    /* 整个left高740 ,80和40，50被用户，搜索框，标签页占据 */
    height: 570px;

    /* 内容多，提供滚动条 */
    overflow: auto;
}

.main .left .list li {
    height: 60px;
    padding: 10px 20px;
    color: white;

    border-top: 1px solid black;
}

/* 选择会话的效果：背景色改变表示选中  */
.main .left .list .selected {
    background-color: rgb(46, 54, 65);
}

/* 会话列表 */
.main .left .list li h3,
.main .left .list li p {
    height: 20px;
    font-size: 14px;
    line-height: 20px;
}

/* 好友列表 */
/* 这两者不能同时出现，需要动态切换 */
/* 需要藏起来 */
.main .left .list li h4 {
    height: 40px;
    line-height: 40px;
    font-size: 20px;
}

/* 这个实现好友列表隐藏 */
.hide {
    display: none;
}

/* 滚动条隐藏 */

::-webkit-scrollbar {
    display: none;
}

.main .right .title {
    height: 50px;
    line-height: 50px;

    font-size: 20px;
    text-align: center;

    border-bottom: 1px solid #ccc;
}


.main .right .message-show {
    height: 550px;

    border-top: 1px solid #ccc;
    border-bottom: 1px solid #ccc;

    overflow: auto;
}

.main .right .message-show .message {
    margin-top: 10px;
    /* 宽度默认，高度不直接设定，因为消息多少不确定 */

    display: flex;
}

/* 别人的消息靠左，我的靠右 */
.main .right .message-show .message-left {
    justify-content: flex-start;
}

.main .right .message-show .message-right {

    justify-content: flex-end;
}

.main .right .message-show .message .box {
    width: 500px;
}

.main .right .message-show .message .box h4 {
    font-weight: normal;
    height: 20px;
    line-height: 20px;
    font-size: 16px;
}

.main .right .message-show .message .box p {
    padding: 20px;
    border-radius: 10px;

}

/* 给消息设置气泡(背景色) */
.main .right .message-show .message-left .box p {
    background-color: #fff;
}

.main .right .message-show .message-right .box p {
    background-color: rgb(79, 216, 79);
}

.main .right .message-input {
    /* 转为块元素方便设置尺寸 */
    display: block;

    width: 100%;
    height: 100px;
    border: none;
    outline: none;

    margin-top: 2px;

    background-color: rgb(230, 230, 230);

    padding: 10px;

    resize: none;
}

.main .right .ctrl {
    height: 35px;
    display: flex;
    justify-content: flex-end;
}

.main .right .ctrl button {
    height: 35px;
    width: 100px;
    background-color: #fff;
    border: 1px solid #ccc;
    border-radius: 5px;
}

.main .right .ctrl :active {

    background-color: gray;
    color: white;

}